Up to date information for the whole SpiNNakerManchester Projects can be found here
As shown there the software is currently being released under the Apache License 2.0 listed here
See: here
See: here
For up to date information on Contributors see the graphs/contributors pages on each project.
For example https://github.com/SpiNNakerManchester/SpiNNMachine/graphs/contributors